Well these are both just matters of opinion. Something which benefits humanity isn't in some way intrinsically better than something which harms it. But you ascribe that based on your own system of morals and preferences. So, while it may well be true that you like that which causes least harm better than that which suppresses goodwill, and while most people might agree with it, this only stems from your feelings on the matter.
So you're saying that it's unlikely that your particular worldview is correct, but that there are certain others which are certainly incorrect?
To have an option suitable for everybody would have been pretty difficult.
Answer the one you prefer.
Our senses of perception, and indeed our entire array of methods of observing the world we live in, are so inaccurate as to be barely even perceiving things. All we ever really experience is our own nervous system (I can't remember who said that, but somebody). So while certainly, we've built up a massive system of scientific knowledge which is, for the most part internally consistent, there's no real confirmation that this maps to 'reality' as it really is. Only that it can suitably explain, again for the most part, what we observe within our nervous system.
Man, that's an interesting question. I'd say, no. But, within my worldview, it's releasing attachment to opinions about truth, and accepting that what we think of as truth, as much as continue to approach it and study it, isn't somehow 'more true' than what somebody else thinks of as truth.
Maybe he is, I haven't looked.
Fiction is something different I think. There's fact, and all sorts of people posit different facts. So a fact isn't set in stone, but is nevertheless thought of as true, while fiction is not thought of as true.
It's not that it's no closer to the truth, it's just that it can only be verified with reference to a particular internally-consistent set of scientific knowledge based on our immensely inaccurate sensory system, which may or may not represent the truth to some degree. So, yeah, I believe it. But I can't validate it to somebody who doesn't hold to the same body of knowledge.
Fair enough.